Drive for a filter unit



FIG. 1 is a left, side perspective view of a drive for a filter unitaccording to the design;

FIG. 2 is a rear, bottom perspective view thereof;

FIG. 3 is a front, top perspective view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a front view thereof;

FIG. 7 is a rear view thereof;

FIG. 8 is a bottom view thereof; and,

FIG. 9 is a top view thereof.

The broken lines shown represent unclaimed subject matter and form nopart of the claimed design.

CLAIM The ornamental design for a drive for a filter unit, as shown anddescribed.